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Energy
What is Energy?
• The ability to do
work.
• There will be a
change in matter’s
– Position
– State
– Form
– Speed
Kinetic Energy
• Energy of motion
• Energy that moving objects have
– Depends on its mass and speed
Potential Energy
•
•
•
•
Energy that is stored up
Objects raised above the ground
Stored in an elastic (springy) object
Energy stored in chemicals
Gravitational
Potential
Elastic
Potential
• Potential Energy stored in
elastic objects such as:
– Bowstrings
– Springs
– Rubber Bands
• Potential Energy stored in
objects that are lifted to a
height above the ground:
– Roller Coasters
– Book on a table
– Rock on a cliff
Chemical
Potential
Potential Energy stored in the chemical
structure of objects
*Fireworks, Bombs, Firewood, Batteries
Seven Forms of Energy
• Just remember: MRS CHEN
• M: Mechanical energy (motion)
• R: Radiant energy (sunlight)
• S: Sound energy
•
•
•
•
C: Chemical energy
H: Heat energy
E: Electrical energy
N: Nuclear energy
Energy Can Take Many Forms
• Energy can not be created nor destroyed!
• One form of energy can be changed to another.
Energy Source
Solar Cell
Wind
Battery
Gasoline
Food
Wood
changes from..
Radiant
Mechanical
Chemical
Chemical
(burning)
Chemical
(digestion
Chemical
to..
Electrical
Electrical
Electrical
Mechanical,
Heat, Sound
Mechanical,
Heat
Heat, Radiant
QUIZ TIME!
What type of energy
cooks food in a
microwave oven?
RADIANT ENERGY
What type of energy is
the spinning plate inside
of a microwave oven?
MECHANICAL ENERGY
QUIZ TIME!
Electrical energy is
transported to your house
through power lines.
When you plug an electric fan
to a power outlet, electrical
energy is transform into what
type of energy?
MECHANICAL ENERGY
QUIZ TIME!
What energy transformation
occurs when an electric lamp is
turned on?
ELECTRICAL ENERGY

RADIANT ENERGY
What types of energy are shown below?
Mechanical and Thermal Energy
(Don’t forget friction)
What type of energy is shown below?
Chemical Energy
What types of energy are shown below?
Electrical, Mechanical and
Radiant Energy
What type of energy is shown below?
Chemical Energy (yummy)
What type of energy is shown below?
Thermal Energy
• Draw a flow map showing the flow of
energy transformations in a car from
starting vehicle to driving. You should
have 5 different types of energy.
Energy Transfer
Sound
(mechanical)
Thermal
Electrical
Mechanical
Chemical
Light
(radiant)
The Law of
Conservation of
Energy
• Energy can not
be created or
destroyed but it
can be changed
or transformed
into a different
form.
Conversion of Energy
• The sum of KE and PE is constant if there is no friction.
• Realistically, some energy is transferred to heat due to
the friction between the wheels and the track.
Ball slows down
Ball speeds up
Energy Source Poster Project
• Materials:
– Magazine, Construction paper, Scissors, Glue
• Find pictures of energy. Cut and glue to your
paper.
• Identify what is the source of that energy:
M R
S
C
H
E
N
– Make sure to label the source
• Label each picture as
renewable/nonrenewable
• 7 pictures are needed on your poster